License Availability Roadmap
| Desktop Operating Systems | Date of General Availability | Direct OEM and Retail License Availability (end date) | System Builder License Availability (end date) |
| MS DOS 6.xx | June 1, 1994 | November 30, 2001 | November 30, 2001 |
| Windows 95 | August 15, 1995 | December 31, 2000 | December 31, 2001 |
| Windows NT Workstation 4.xx | July 29, 1996 | June 30, 2002 | June 30, 2003 |
| Windows 98 | June 30, 1998 | June 30, 2002 | November 30, 20031 |
| Windows 98 SE | June 30, 1999 | June 30, 2002 | March 31, 20041 |
| Windows Millennium Edition (Windows Me) | December 31, 2000 | December 31, 2003 | June 30, 2004 |
| Windows 2000 Professional | March 31, 2000 | March 31, 2004 | March 31, 2005 |
| Windows XP Professional | December 31, 2001 | June 30, 2008 | January 31, 2009 |
| Windows XP Tablet PC Edition | February 11, 2003 | June 30, 2008 | January 31, 2009 |
| Windows XP Professional x64 Edition | April 25, 2005 | June 30, 2008 | January 31, 2009 |
| Windows XP Home Edition | December 31, 2001 | June 30, 2008 | January 31, 2009 |
| Windows XP Media Center Edition2 | October 28, 2002 | June 30, 2008 | January 31, 2009 |